Specific questions about using WRT54G as bridge-router

My landlord, one floor above, has a Netgear 802.11g router, and we were interested in connecting to that router (with his permission) and saving ourselves $70/month in phone+DSL charges. I'm trying to determine from what's posted here and in anandtech whether the following is possible:

1. Will the WRT54G work in "Client Mode" not just with WEP but with WPA-PSK?

2. I plan on wiring at least two PCs to the WRT54G. Will peer-to-peer data sharing (via my Windows workgroup) between my two PCs go directly through the WRT54G, or will it have to go all the way back to my landlord's Netgear router? (If the latter, I am no better off now than if I bought 2 wireless APs or PCI cards, and will have saved myself a good bit of hassle, too.)

3. Will a computer connected to my landlord's Netgear router be able to see/access computers connected to my WRT54G router? I've read in various support forums of people who want the opposite -- treating the entire network as one -- but since we are 2 separate households I would prefer to have two, distinct networks in terms of my Windows workgroup.

4. Assuming the answer to 3 is "no" (that is, my landlord cannot access my Windows workgroup), can a laptop in my apartment connect to the Windows workgroup via the WRT54G operating in client mode, or does it have to connect to the landlord's Netgear router?

5. What are people's experiences with Sveasoft? I don't like that I can't read their manuals or support without becoming a customer.

6. When it's all said and done, am I just better off popping wireless PCI cards into my desktops and forgetting about it?

Thanks in advance and apologies if I'm using imprecise language. I am not a networking or wireless proficient person!

Ultimately I decided to purchase the Netgear GWPS606 wireless printer server ($100-$20 rebates @ BestBuy) which did (almost) exactly what I describe above (except, I think, #3) and gives me a printer server to boot. Thanks for the answers, tho!